Foam insulation in a sump

[blackbeltmom]

So I have been having issues with my return pump vibrating, even with the rubber feet on it. It was suggested to me to use the expanded polystyrene foam sheet insulation like I sat my sump on. Is this safe, does it leach anything?

 

[blackbeltmom]

This is a duplicate, can a admin delete it please?

So I have been having issues with my return pump vibrating, even with the rubber feet on it. It was suggested to me to use the expanded polystyrene foam sheet insulation like I sat my sump on. Is this safe, does it leach anything?